Pith Number

pith:3B2JQGA5

pith:2004:3B2JQGA5Y2CGCFL3LJNUUHJUJW

not attested not anchored not stored refs pending

Observing Mkn 421 with XMM--Newton: the EPIC--PN point of view

F. Tavecchio, G. Ghisellini, G. Tagliaferri, M. Ravasio

arxiv:astro-ph/0406481 v1 · 2004-06-22 · astro-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3B2JQGA5Y2CGCFL3LJNUUHJUJW}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-04T16:44:03.645243Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d87498181dc68461157b5a5b4a1d344db6bfc2561f8f6e7338fc817d9f33c374

Aliases

arxiv: astro-ph/0406481 · arxiv_version: astro-ph/0406481v1 · doi: 10.48550/arxiv.astro-ph/0406481 · pith_short_12: 3B2JQGA5Y2CG · pith_short_16: 3B2JQGA5Y2CGCFL3 · pith_short_8: 3B2JQGA5

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/3B2JQGA5Y2CGCFL3LJNUUHJUJW \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: d87498181dc68461157b5a5b4a1d344db6bfc2561f8f6e7338fc817d9f33c374

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4ff8b08c2560fbadb5a63f9790636658b890a680cf4b4b9b3865fdbee4c86795",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2004-06-22T13:34:41Z",
    "title_canon_sha256": "d5d4d8ce096031e5b0d0b04e292816547ba98f9273b0ea3021203d8f7c05943c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0406481",
    "kind": "arxiv",
    "version": 1
  }
}